21013223113 has 8 divisors (see below), whose sum is σ = 21736413440. Its totient is φ = 20298204720.

The previous prime is 21013223093. The next prime is 21013223171. The reversal of 21013223113 is 31132231012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21013223113 - 2¹³ = 21013214921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21013223183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2037753 + ... + 2048038.

It is an arithmetic number, because the mean of its divisors is an integer number (2717051680).

Almost surely, 2^21013223113 is an apocalyptic number.

It is an amenable number.

21013223113 is a deficient number, since it is larger than the sum of its proper divisors (723190327).

21013223113 is a wasteful number, since it uses less digits than its factorization.

21013223113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085967.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21013223113 its reverse (31132231012), we get a palindrome (52145454125).

The spelling of 21013223113 in words is "twenty-one billion, thirteen million, two hundred twenty-three thousand, one hundred thirteen".